#pragma once

#include<iostream>
#include<vector>
#include<ctime>
#include<unistd.h>
#include<functional>

//using task_t = std::function<void()>;
typedef std::function<void()> task_t;

void Download()
{
    std::cout << "我是一个下载任务"
            << " 处理者: " << getpid() << std::endl;
}

void PrintLog()
{
    std::cout << "我是一个打印日志的任务"
        << " 处理者: " << getpid() << std::endl;
}

void PushVideoStream()
{
    std::cout << "这是一个推送视频流的任务"
              << " 处理者: " << getpid() << std::endl;
}

class Init
{
public:
    //任务码
    const static int g_download_code =0;
    const static int g_printlog_code = 1;
    const static int g_push_videostream_code = 2;
    //任务集合
    std::vector<task_t> tasks;

public:
    Init()
    {
        tasks.push_back(Download);
        tasks.push_back(PrintLog);
        tasks.push_back(PushVideoStream);

        srand(time(nullptr) ^ getpid());
    }

    bool CheckSafe(int code)
    {
        if(code >= 0 && code < tasks.size())
            return true;
        else
            return false;
    }

    void RunTask(int code)
    {
        return tasks[code]();
    }

    int SelectTask()
    {
        return rand() % tasks.size();
    }
    
    std::string ToDesc(int code)
    {
        switch (code)
        {
        case g_download_code:
            return "Download";
        case g_printlog_code:
            return "PrintLog";
        case g_push_videostream_code:
            return "PushVideoStream";
        default:
            return "Unknow";
        }
    }
};

Init init;  //在hpp文件下可以定义对象